(1) Any person interested in land in the area of a local planning authority may, by agreement or otherwise, enter into an obligation (referred to in this section and sections 106A as “a planning obligation”), enforceable to the extent mentioned in subsection (3) — (1) Any person interested in land in the area of a local planning authority may, by agreement or otherwise, enter into an obligation (referred to in this section and sections 106A as “a planning obligation”), enforceable to the extent mentioned in subsection (3) —(1) Any person interested in land in the area of a local planning authority may, by agreement or otherwise, enter into an obligation (referred to in this section and sections 106A as “a planning obligation”), enforceable to the extent mentioned in subsection (3) —(a) re

